A Russian oligarch has been left with a legal bill of £35m after losing a High Court battle with Roman Abramovich.

Earlier this year judge Mrs Justice Gloster dismissed a series of claims by Boris Berezovsky, who wanted more than £3bn damages from the Chelsea Football Club owner relating to deals done in Russia.

The judge was told on Friday by lawyers that Mr Berezovsky had agreed to pay tens of millions towards Mr Abramovich's legal costs in the wake of her ruling.

Legal magazine The Lawyer has said the case is thought to have generated total fees of more than £100m.

Mr Berezovsky, 66, had sued and accused Mr Abramovich, 45, of blackmail, breach of trust and breach of contract.

He said the billionaire Russian businessman had "intimidated" him into selling shares in a Russian oil company at a fraction of their value and broken a promise made during a deal relating to a Russian aluminium company.

Mr Abramovich said the claims had "no merit".

Mrs Justice Gloster ruled in Mr Abramovich's favour in August following a trial in London between October 2011 and January 2012.

The judge described Mr Berezovsky as an "unimpressive, and inherently unreliable, witness" but said she found Mr Abramovich to be a "truthful, and on the whole reliable, witness".

The judge was also told that Mr Berezovsky had decided not to appeal against her ruling.